Schifra User Group 1

Developers wanting to use the Schifra Reed-Solomon error correcting code
library and its components within an open source, academic or other
noncommercial/not-for-profit environment are defined within Schifra User
Group 1 (SUG1)

Free use of the Schifra Reed-Solomon error correcting code library
and its components are permitted to developers of SUG1 under the guidelines
and in accordance with the GNU General Public License (version 2).

Schifra User Group 2

Developers wanting to use the Schifra Reed-Solomon error correcting code
library and its components within a commercial environment or application,
which includes, but is not limited to engineering practices such as initial
code evaluation through prototyping and experimenting to fullscale development
and integration, are defined within Schifra User Group 2 (SUG2).

Royalty Free use of the Schifra Reed-Solomon error correcting code library
and its components are permitted to developers of SUG2 under the guidelines
and in accordance with a specifically purchased Schifra Commercial License.